Fan-ventilator.



I W. P. WARDEN. FAN-VENTILATOR.

APRLIQATION FILED JUNE 24, 1911.

' 1,117,287; Patnted Nov. 1?, 1914.

1:2 4 N If M 8 UNITED STATES PATENT OFFICE. WILLIAM F. F AKRON, OHIO, AS SIG1\TOR TO THE BTTRT MANUFACTO'BTNG COMPANY, OF AKRON, OHIO, CORPORATION OF OHIO.

FAN-VENTILATOB.

To all whom it may concern:

, Be it known that 1, WILLIAM F. WARDEN,

a citizen of the "United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Fan-Ventilators, of

which the following is a full, clear, and exact description, reference being had to theaccompanying drawings.

This invention relates to ventilators .and has for its especial object the provision of a cheap and serviceable device of this class comprising a. fan for the positive roduction of a draft and a damper for regu ating said draft, said regulating means being so formedas to offer the slightest possible opposition to the fan when in open position.

tubular air-shaft therefor.

Another object-is theprovision in a device of this kind of a fan driving, mechanism, which shall be noiseless and wear proof, and at the same time shall be adjustable to vary the speed of the fan as required. Other objects'a-nd advantages will appear from the following description and claims.

. One embodiment of my invention is illustrated in the accompanying drawings in which Figure 1 is a vertical sectional view of the ventilator, the fan and driving mechanism being shown in section, and Fig. 2 is a sectional view of the fan and driving mechanism drawn to larger scale.

Describing the parts of the aforesaid drawing by reference numerals, 1 denotes the lower section and 2 the upper section or top of a ventilator. The lower section is preferably cylindrical and is adapted to be applied to the roof of a buildin to provide a he upper section is shown as a conical roof, the lower edge 3 of which projects beyond and over-.

hangs the lower section and is spaced vertically therefrom to provide an annular discharge port. Said upper section or top is supported upon the lower section by a plurality of vertical braces 4 suitably attached adjacent the upper edge of they lower portion, as by rivets 5. The upper ends of these braces are bent downward at the angle of the top section, as shown at 6, and secured to the top by rivets. The outer ends of these downwardly bent portions are carried'outward beyond the edge 3 of the top, bent ver- Specification of Letters Patent.

Patented Nov. 17, 1914..

Application filed June 24, 1911. Serial No. 635,199

these braces as by rivets 11 is the cylindrical l shield 12. A frustro-conical deflector plate 13 having an upturned cylindrical flange 14: is secured substantially level with the top of the lower section of the ventilator, preferably by means of a single rivet passing through the upturned lug 10, the flan e 1 1 and the vertical brace 4 as shown. ther deflectors 15 may be secured to the braces 4, one of these being illustrated. Each of the braces 4 is offset away from the edge of the lower section at 16 in order to provide a seat for the conical damper now to be described.

Vertically positioned in the axis ofthe ventilator 1s a round post, attached at its upper end to the peak 18 of the top 2, and supported at its lower end by braces attached to the sides of the lower section. A sleeve 20 having an upwardly flaring flange 21 is slidably mounted on this post and a conical metal plate is riveted to this flange, said plate being of slightly greater diameter than the lower section 1, and adapted to seat upon the upper edge23 thereof to form a damper. Braces 24 cross the upper portion of the damper and slide upon the post 19 at 25, preventing wabbling. Chains 26 passing over pulleys 27 are secured to the damper and permit operation thereof from below, said chains preferably containing fusible links 28 operative to close the ventilator in case of fire.

Conveniently secured inside the lower section, as by means of a sleeve 29 on the post 17 and a bracket 30 on the brace 19, is a countershaft 31 projecting radially from the spring 37 may be employed compressed between a collar 38 attached to the post and a suitable bearing 39 supported by arms 40 from the fan hub 33. I have shown a ball bearing consisting of two grooved plates with balls between them as being a cheap and efficient construction.

For the purpose of stopping the fan in case of fire, or when, for any reason, the damper is closed, means may be provided for raising the friction plate away from the wheel. Such means may conveniently consist of a lever 41 pivoted to a bracket l2 clamped upon the s aft 31, or other convenient support, and adapted to be contacted by an adjustable stop 4C3 clamped to one of the chains 26. This stop is so positioned upon the chain that as the damper approaches its closed position, the lever 41 is raised so as to draw the roller 4.4 against the friction plate and lift it off the wheel 32. At the same time it will be noted that this action does not occur until the damper is very nearly closed, thus allowin regulation of the draft before the power 1S cut off from the fan. if desired, a second stop 45 may be attached to the chain so that in case the lever should stick, it can be positively drawn down out of engagement with the plate.

The speed of the fan can-be adjusted by setting the friction wheel 32 nearer to, or farther from the post 17, the collar 46 and bracket 30 being properly loosened and reset. The conical shape of the damper is of advantage when in. open position, since it serves to direct the air current in proper direction without the formation of eddies. In case of fire the fusible links promptly melt, allowing the damper to close, and at the same time stopping the fan in the manner above described.

Having thus described my invention, what I claim is:

l. A ventilator comprising in combination a cylindrical lower section adapted to be supported upon the roof of a building, a vertical post axially supported in said section, a shaft extending radially from said post, a friction wheel rotatably mounted on said shaft, a fan rotatably mounted on said post and having a friction plate adapted to rest upon said friction wheel, means for driving said friction wheel, a lever mounted beneath said plate, a roller carried by said lever, and means for raising said lever so as to force said roller intocengagement with said plate and raise said plate out of contact with said friction wheel.

2. A ventilator comprising in combination a cylindrical lower section adapted to be supported upon the roof of a building, a vertical post axially supported in said section, a shaft extending radially from said post, a friction wheel rotatably mounted with its axis substantially at right angles with. sa d post, a fanrotatably mounted on said post and having a friction plate adapted to rest upon said friction wheel, means w a wide range of for driving said wheel, a rotatable anti-- friction member beneath said plate, and means for elevating said member against said plate so as to raise said plate from said wheel.

3. A ventilator comprising in combination a cylindrical lower section adapted to be supported upon the roof of a building, a vertical. post axially supported in said section, a fixed shaft extending radially from said post, a friction wheel rotatably mounted on said shaft, a fan'rotatably mounted on said post and having a friction plate adapted to rest upon said friction wheel, means for driving said wheel, a bracket carried by said shaft, a lever pivoted to said bracket,

antifriction means carried by said lever beneath said plate, and means for inclining said lever to shift said antifriction means into engagement with said plate and elevate said plate from said wheel.

4:. A. ventilator comprising, in' combination, a lower section adapted to be supported upon the roof of a building, a top section overlapping and spaced from said lower section, a vertical post running axially through both sections, a damper slidably mounted on said post, and adapted, when lowered, to close the passage through the ventilator and when raised to define a free exhaust port, an exhaust fan rotatably mounted on said post, a downwardly facing friction plate carried by said fan, a friction wheel journaled upon an axis substantially perpendicular to said post and disposed beneath said plate, means for rotating said Wheel, a lever pivotally supported by said post beneath said plate, antifriction means carried by said lever, flexible tension means for raising and lowering said damper, and connections between said lever and said tension means for elevating said antifriction means against said plate and disengaging the same from said friction wheel as said damper approaches a position of closure.

5. A ventilator comprising, in combina tion, a hollow open section adapted to be supported in upright position upon the roof of a building, a vertically movable damper plate adapted, when lowered, to rest upon the upper end of said section and close the passageway therethrough, pulleys fixedly supported as regards said lower sections, flexible tension means passing over said pulleys and engaging said damper plate whereby a downward pull upon said tension means will raisesaid damper plate, an exhaust fan rotatably mounted in said lower section with its axis substantially vertical, a downwardly facing friction plate carried by said exhaust fan, a friction wheel journaled upon a substantially horizontal axis and disposed beneath said plate, means for driving said friction wheel, a rotatable antifriction member beneath said plate, and connections between said antifriction member and said tension means whereby the movement of said damper to closed position Will elevate said member against said plate so as to raise said plate from said friction wheel.

6. A ventilator comprising, in combination, a hollow open section adapted to be supported in substantially vertical position upon the roof of a building, a damper member supported above said section and adapted, when lowered, to close the passage therethrough, an exhaust fan journaled upon a substantially vertical axis beneath said damper, means for driving said fan, means including a fusible element for maintaining said damper in elevated position, and connections between said damper and fan for disengaging said fan from said driving means upon the approach of said damper to closed position, said connections being independent of said fusible element.

In testimony whereof, I hereunto aflix my signature in the presence of'two witnesses.

WILLIAM F. WARDEN. Witnesses:

J. D. PALMER, FLORENCE LEIB. 

